That's not what "cloud only" typically means though.

Online-only DRM is bad yeah, but with sufficient effort it can be sidestepped : see the unofficial WoW servers.

Meanwhile game streaming is extremely resource heavy, needs rock solid Internet connections, and runs into laws of physics for latency issues. But more games will probably go this route, yeah, especially those targeting players of specific (high) wealth brackets. (Boycott them, just like other online-only DRM.)